myeloid cells. Inversion of chromosome 16 [inv (16)] is a cytogenetic marker for M4Eo
subtype of acute myeloid leukaemia (AML). The possibility of an association between the
development of granulocytic sarcoma of the small intestine (GSSI) and the M4Eo subtype of
AML was suggested in nine previous case reports. Here we report an aleukaemic case of
GSSI with inv (16) and its molecular equivalent, the CBFβ/MYH11 fusion gene, detected by …